Wicked69

Okay, so how would that turbo in twins do on a 5.3? Too big?

T76s10

iTrader: (6)

personally i think so. those ebay gt45's i think are great for single turbo setups, but that 1.00+ ar on them are just too big for twins IMO. im no turbo expert, but, i think that either the on3 70's or 61's would be perfect. the on3 turbos have the 65mm turbine wheel which is small enough to spool the turbos quick enough and you can get them in .68ar housings. im doing on3's 61mm turbos because they'll support 1000hp and spool quicker than the t70's.

Wicked69

That would be too bad. They would only be $500 shipped to the door. **** I paid that much just for a rebuild. They would still be about $175 cheaper for the pair with shipping and price difference. I do have a nitrous kit I could use to spool them. I also use a pretty aggressive cam. Not sure if that would matter.

T76s10

iTrader: (6)

how much street driving do you do? if you do alot of track i say do the gt45's because the nitrous and cam will spool them no prob when you stall it up. only reason im doing the 61mm turbos is because my s10 is going to be mainly street driven so i want something thatll spool on the highway instantly and will still be able to boost launch w/o nitrous.

Wicked69

I do some street driving but I don't drive too crazy on the street. I usually have my young kids with me ages 8, 6, 5, 4, and 3 months. It doesn't take much to give them a thrill. Definitely not worth the risk. As long as it would drive on the street I wouldn't car too much about instant spool. I would be willing to give up a lot of street manners to be able to perform at the strip. I want a car that can be driven anywhere and run 5's on a junk yard motor. Chinese turbos even makes it better.

a4ls2goat

just do the gt45s, im sure itll be a little laggy, but when it does hit, you better hold on!!!

theirs 5.3s with 88mm turbos and they spool them with nitrous, im sure you can do the same. nitrous solves everything!!

Wicked69

Damn that's cool! If nothing else I can run the 1/4. Shoot my little 5.3's I was running too short of a tire and hit the rev limiter about 100 meters from the finish and let off and still went a 144 mph! Can't wait to see what these would do. If I can get it to spool quickly I can run the local 1/8th and if I can't just go run the 1/4. I would think my cam and transbrake would help a ton and if not I can add the nitrous kit. Thank goodness I haven't sold it yet.

I might be able to order these in a couple days now!

a4ls2goat

to give you an idea of the beast size of a gt45 next to my son. lol

a4ls2goat

what year 5.3 did you have? and which one do you have now?

also, how are those ebay headstuds holding up? they look pretty stout?
im thinking of picking some up

Wicked69

I think I will need to make some brackets to hold those. lol I just used the mild steel from the exhaust to hold up the PTE62's. Those look a lot bigger. Room isn't an issue but it will definitely need some type of bracket.

T76s10

iTrader: (6)

christ, those do look huge. i bought some of those ebay head studs too, hope they keep them heads down lol.

71 chevy

iTrader: (18)

twin gt45s are too big period and you wont enjoy it, on the street or at the track, when its taking 5 seconds to get to your launch boost.

spend the $100 more or so now and skip the nitrous later

a4ls2goat

Ima try 2 gt45s next year on my 5.3 and a hundred shot
I have both turbos anyway.
I'll get my stall restalled to like 4k rpm or so.

a-low

iTrader: (26)

Dang that looks like the size of a BW turbo. Any idea on how much it weighs?

Sarg

iTrader: (6)

Which turbo have you decided on?

T76s10

iTrader: (6)

Nitrous and lag don't belong in the same sentence

71 chevy

iTrader: (18)

good luck with that. Let us know how you enjoy using 1800hp worth of turbos to make 800hp

T76s10

iTrader: (6)

if worst comes to worst, he can always sell them. I'm sure they will get snatched up quick. Then he can buy some more Ebay turbos that'll spool quicker

71 chevy

iTrader: (18)

I prefer ideal setups over worst case scenarios.

Wicked69

It's kind of hard to go against 71 chevy. He has done this and run some damn good times. A good point is the 70's would bolt right on with no modifications. The GT45's would need some modifications and definitely need the nitrous. So probably is just better to sale the nitrous kit cheap and get the ON370's. This way it would be good on both the street and the strip.

Lots of good input but I'll go ahead and give the on3 70's a shot first.